Wrote some of the boilerplate. Now we can get to the meat of the matter.

haiku/GNUmakeinc.mk

@@ -2,7 +2,10 @@
 
 CXXFILES += \
 	haiku/alloc.cpp \
-	haiku/main.cpp
+	haiku/control.cpp \
+	haiku/main.cpp \
+	haiku/text.cpp \
+	haiku/util.cpp
 
 HFILES += \
 	haiku/uipriv_haiku.hpp

haiku/control.cpp

@@ -0,0 +1,43 @@
+// 16 august 2015
+#include "uipriv_haiku.hpp"
+
+static uintmax_t type_uiHaikuControl = 0;
+
+uintmax_t uiHaikuControlType(void)
+{
+	if (type_uiHaikuControl == 0)
+		type_uiHaikuControl = uiRegisterType("uiHaikuControl", uiControlType(), sizeof (uiHaikuControl));
+	return type_uiHaikuControl;
+}
+
+static void defaultCommitShow(uiControl *c)
+{
+	BView *view;
+
+	view = (BView *) uiControlHandle(c);
+	view->Show();
+}
+
+static void defaultCommitHide(uiControl *c)
+{
+	BView *view;
+
+	view = (BView *) uiControlHandle(c);
+	view->Hide();
+}
+
+void osCommitEnable(uiControl *c)
+{
+	// TODO this might need to be per-widget
+}
+
+void osCommitDisable(uiControl *c)
+{
+	// TODO this might need to be per-widget
+}
+
+void uiHaikuFinishControl(uiControl *c)
+{
+	c->CommitShow = defaultCommitShow;
+	c->CommitHide = defaultCommitHide;
+}

haiku/text.cpp

@@ -0,0 +1,15 @@
+// 9 april 2015
+#include <cstdlib>
+#include <cstring>
+#include "uipriv_haiku.hpp"
+using namespace std;
+
+char *uiHaikuStrdupText(const char *t)
+{
+	return strdup(t);
+}
+
+void uiFreeText(char *t)
+{
+	free(t);
+}

haiku/util.cpp

@@ -0,0 +1,17 @@
+// 7 april 2015
+#include <cstdio>
+#include <cstdlib>
+#include "uipriv_haiku.hpp"
+using namespace std;
+
+void complain(const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	fprintf(stderr, "[libui] ");
+	vfprintf(stderr, fmt, ap);
+	fprintf(stderr, "\n");
+	va_end(ap);
+	abort();
+}